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Issue Date: November 22, 1995
Revision Date: September 2, 2008
Estabrook
EZY CHEK Systems
(originally listed as Horner EZY CHEK)
EZY-Chek II
VOLUMETRIC TANK TIGHTNESS TEST
METHOD (UNDERFILL)
Estabrook EZY Chek Systems no longer manufactures or supports the use of this
method.
| Certification |
Leak rate of 0.1
gph with PD = 95.79% and PFA = 4.21%. |
| Leak
Threshold |
0.05 gph.
A tank system should not be declared tight if the test result indicates a
loss or gain that equals or exceeds this threshold. |
| Applicability |
Gasoline, diesel,
aviation fuel, fuel oil #4. |
| Tank
Capacity |
Maximum of 12,000
gallons.
Tank must be between 98 and 100% full. |
| Waiting
Time |
Minimum of 8
hours between delivery and testing.
There must be no product dispensing or delivery during waiting time. |
| Test
Period |
Minimum of 1
hour, 40 minutes (33 minutes monitor mode and 1 hour, 7 minutes test
mode).
At the conclusion of test mode, data are checked for the manufacturer's
stop test criteria.
If data do not meet the criteria, testing must continue.
Test data are acquired and recorded by system's computer.
Leak rate is calculated from last 1 hour, 7 minutes of test period
data.
There must be no dispensing or delivery during test. |
| Temperature |
Average for
product is determined by a resistance temperature detector (RTD). |
| Groundwater |
Depth to
groundwater in tank excavation backfill must be determined.
If groundwater is above bottom of tank, product level must be adjusted to
provide a minimum net pressure of 1 psi at bottom of tank during test. If
this cannot be accomplished, then the tank cannot be tested using this
system. |
| Calibration |
Load cell must be
calibrated in accordance with manufacturer's instructions before each use. |
| Comments |
Not evaluated
using manifolded tank systems.
Tests only portion of tank containing product.
As product level is lowered, leak rate in a leaking tank decreases (due to
lower head pressure).
Consistent testing at low levels could allow a leak to remain
undetected.
EPA leak detection regulations require testing of the portion of the tank
system which routinely contains product. |
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Estabrook
EZY CHEK Systems
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Evaluator:
W. A. Kibbe and Associates
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1505
Woodside Ave.
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Tel:
(517) 797-2425
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Essexville,
MI 48732
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Date
of Evaluation: 06/25/90
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Tel:
(989) 891-9868
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E-mail: sales@ezychek.com |
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URL: www.ezychek.com |
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